An alternative method of quantum dot synthesis, ..

AB - The reaction parameters of low-temperature synthesis of colloidal nanocrystals were investigated. It was found the structural and optical properties of CdSe nanocrystal quantum dots synthesized at 130 °C are particularly sensitive to alkyl-chain lengths of ligands, the cadmium source, and ligand to precursor ratios. Under optimized synthesis conditions CdSe quantum dots with narrow ensemble size distribution and excellent photoluminescence quantum efficiencies of up to 40 percent were obtained.

Synthesis of bright CdSe nanocrystals by optimization …

Nanoco for the use of their low-temperature molecular seeding method for ..
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Insights into Reversible Dissolution ..

The dissolution behavior of colloidal CdSe nanocrystal quantum dots is investigated. A series of experiments is conducted to study the stability of nanocrystals based on a simple reversible dissolution-growth reaction model. Immersing purified CdSe quantum dots in a fresh solvent at elevated temperatures resulted in their dissolution with rates determined by their concentration, size, type and amount of ligands present in solution, and temperature. In general, highest dissolution rates were observed for diluted quantum dot solutions in the presence of phosphonic acids and carboxylic acids ligands, at temperatures below 200 °C. Importantly, the dissolution process is reversible and regrowth of quantum dots occurs at temperatures above 220 °C. It is concluded that the most stable state of nanocrystal quantum dots in solution is an equilibrium between formed crystals and free molecular precursors in solution.

Low temperature studies of the photoluminescence …

N2 - The reaction parameters of low-temperature synthesis of colloidal nanocrystals were investigated. It was found the structural and optical properties of CdSe nanocrystal quantum dots synthesized at 130 °C are particularly sensitive to alkyl-chain lengths of ligands, the cadmium source, and ligand to precursor ratios. Under optimized synthesis conditions CdSe quantum dots with narrow ensemble size distribution and excellent photoluminescence quantum efficiencies of up to 40 percent were obtained.

The invention pertains to the rapid low-temperature synthesis of quantum dots, such as CdTe or CdSe, via thermal and sonochemical methods
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Faster Synthesis for CdSe Quantum Dot Nanocrystals

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Low-Temperature Synthesis and Characterisation of …